Comparing Device-Generated and Calculated Bioimpedance Variables in Community-Dwelling Older Adults.

Despite BIA emerging as a clinical tool for assessing older adults, it remains unclear how to calculate whole-body impedance (Z), reactance (Xc), resistance (R), and phase angle (PhA) from segmental values using modern BIA devices that place electrodes on both sides of the body. This investigation aimed to compare both the whole-body and segmental device-generated phase angle (PhADG) with the phase angle calculated using summed Z, Xc, and R from the left, right, and combined sides of the body (PhACalc) and to compare bioelectric variables between sides of the body. A sample of 103 community-dwelling older adults was assessed using a 50 kHz direct segmental multifrequency BIA device. Whole-body PhACalc values were assessed for agreement with PhADG using 2.5th and 97.5th quantile nonparametric limits of agreement and Spearman's rho. Bioelectrical values between sides of the body were compared using Wilcoxon rank and Spearman's rho. A smaller mean difference was observed between PhADG and right PhACalc (-0.004°, p = 0.26) than between PhACalc on the left (0.107°, p = 0.01) and on the combined sides (0.107°, p < 0.001). The sum of Z, R, and PhACalc was significantly different (p < 0.01) between the left (559.66 ± 99.55 Ω, 556.80 ± 99.52 Ω, 5.51 ± 1.5°, respectively) and the right sides (554.60 ± 94.52 Ω, 552.02 ± 94.23 Ω, 5.41 ± 0.8°, respectively). Bilateral BIA values do not appear to be interchangeable when determining whole-body measurements. Present data suggest that using right-sided segmental values would be the most appropriate choice for calculating whole-body bioelectrical variables.

Psychometric testing of the Thai version of Caregiver Contribution to Self-Care of Chronic Illness Inventory version 2.

AIM: To assess the psychometric properties of the Thai version of Caregiver Contribution to Self-Care of Chronic Illness Inventory version 2 (CC-SC-CII-v2) among primary caregivers of individuals with any single or multiple chronic illnesses. BACKGROUND: The instrument encompasses three scales that evaluate Caregiver Contribution to Self-Care (CC-SC) Maintenance, Monitoring and Management. METHODS: The English version CC-SC-CII-v2 was translated and adapted for Thai context, and a cross-sectional multicenter study involved 430 caregivers from 16 primary care centres in Thailand. Structural validity, internal consistency reliability and test-retest reliability were examined. RESULTS: The original two-factor CC-SC Maintenance scale required a re-specified model for good fit, while the CC-SC Monitoring and CC-SC Management scales fit well. The simultaneous model of three scales demonstrated satisfactory fit. The CC-SC Maintenance and CC-SC Management scales both had a composite reliability index of 0.85, with omega coefficients of 0.86 and 0.83, respectively. CC-SC Monitoring had an alpha coefficient of 0.89. The intraclass correlation coefficients ranging from 0.84 to 0.91, indicating good test-retest reliability. CONCLUSION: The Thai CC-SC-CII-v2 is a valid and reliable instrument that can provide clinicians and investigators with an evaluation of the contributions of caregivers to the self-care of patients with chronic illnesses.

Recruitment Strategies for a Technology-Based Fall Risk Assessment Research Study Among Community-Dwelling Older Adults During a Global Pandemic.

PURPOSE: To describe successful strategies for the recruitment of diverse community-dwelling older adults for a technology-based fall risk assessment research study during the global coronavirus disease 2019 pandemic. METHOD: In this cross-sectional study, 124 adults aged ≥60 years agreed to participate. We used several recruitment strategies, including social media platforms, local community centers, flyers, contacting key persons, word of mouth, and contacting participants from previous research projects. RESULTS: Targeted and personalized strategies for recruitment, including contacting a key community leader (52.4%, n = 65) and communication with friends and family members (46.7%, n = 58), were the most successful. One (0.8%) participant was recruited from a prior research project. In contrast, individuals were not recruited from posted flyers and social media. CONCLUSION: Recruitment can be improved with word of mouth and contacting key persons, such as community leaders, which can be achieved by building a trusted relationship between researchers and community leaders. [Journal of Gerontological Nursing, 50(9), 18-23.].

Comparing Sleep Quality, Duration, and Efficiency Among Low-Income Community-Dwelling Older Adults With and Without Physical Disabilities.

PURPOSE: Physical disabilities may exacerbate the natural decline in sleep quality that occurs with aging. In the current study, we assessed sleep quality and medicinal sleep aid use among 87 community-dwelling older adults with (n = 24) and without (n = 63) physical disabilities. METHOD: Sleep quality, duration, and efficiency were assessed subjectively with the Pittsburgh Sleep Quality Index. Sleep duration and efficiency were objectively measured with actigraphy. Participants self-reported medicinal sleep aid use. RESULTS: Significant group differences were observed in sleep duration measured objectively (p = 0.01) and subjectively (p = 0.04). No other group differences were observed for sleep factors (p > 0.05) or medicinal sleep aid use (p = 0.41). CONCLUSION: Findings show that physical disability may be a factor in sleep duration; however, physical disability was not found to be associated with worsened sleep perception or greater reliance on medicinal sleep aids. Future research should consider longer objective actigraphy assessment windows and explore potential subgroup differences in sex and race/ethnicity. [Journal of Gerontological Nursing, 50(7), 12-18.].

Translation and Cross-cultural Adaptation of the Self-care of Hypertension Inventory for Thais With Hypertension.

BACKGROUND: Self-care is essential for treating hypertension by lowering and controlling blood pressure, to ultimately reduce cardiovascular disease. A valid and reliable hypertension self-care measure is needed for the Thai population. OBJECTIVE: The aim of this study was to translate a cross-cultural adaptation of the Self-care of Hypertension Inventory (SC-HI) into Thai and conduct a pretest of the Thai SC-HI (version 2.0). METHODS: We performed a methodological study. The stepped approach included translation of the original version of the SC-HI into Thai (forward), synthesis of translation, translation of the Thai version back to English, expert committee review, and pretesting. Pretest phase for feasibility, interobserver agreement, and temporal stability tests were performed in 140 patients with hypertension. RESULTS: Translation equivalence was obtained between the Thai and the original US versions. The item-level content validity index was rated by 9 experts; the relevance, clarity, simplicity, and ambiguity criteria were all 1.00. Similarly, the scale-level content validity indices were 1.00 for the overall instrument and the self-care maintenance, self-care management, and self-care confidence scales. The item-level intraclass correlation coefficients (ICCs) had a range of 0.97 to 1.00 for interobserver agreement and 0.95 to 1.00 for test-retest, respectively. The interobserver ICCs were 0.99 for the total scale and 3 separate scales. The test-retest ICCs were 0.99 for the total scale, with a range of 0.97 to 0.99 for the three separate scales. CONCLUSION: The process of cross-cultural adaptation warranted validity and reliability testing of the Thai SC-HI. Psychometric testing of this instrument is needed for evaluation in a large sample of individuals with hypertension.

Levels of Accelerometer-Based Physical Activity in Older Adults With a Mismatch Between Physiological Fall Risk and Fear of Falling.

We examined the associations between levels of accelerometer-based physical activity and the mismatch of physiological fall risk and fear of falling (FOF) in community-dwelling older adults. We assessed 123 participants who received 7-day wrist-worn accelerometry. Physiological fall risk was assessed using the portable BTrackS™ balance system and FOF was assessed using a short version of the Falls Efficacy Scale-International. Participants were categorized into four groups: rational (low FOF/normal balance), irrational (high FOF/normal balance), incongruent (low FOF/poor balance), and congruent (high FOF/poor balance). One third of older adults had a mismatch between their FOF and actual fall risk. Accelerometer-based moderate to vigorous physical activity (MVPA) was significantly different in the irrational group compared to the rational group (p = 0.023) and the congruent group compared to the rational group (p = 0.032). Encouraging older adults to improve MVPA may prevent them from shifting from rational to irrational or congruent groups, thereby reducing the risk of injurious falls. [Journal of Gerontological Nursing, 49(6), 41-49.].

The effects of nurse driven mobility intervention (NDMI) on activities of daily living, mobility, fear of falling, and balance performance in hospitalized older patients: A pilot study.

A decrease in mobilization during hospitalization leads to a decline in physical function for older patients, and nurses play a critical role in mobility promotion. The purpose of this pilot study was to examine the feasibility of Nurse Driven Mobility Intervention (NDMI) in improving activities of daily living, mobility, fear of falling, balance performance, and maladaptive fall risk appraisal using a one-group pretest-posttest design. NDMI incorporates a multidisciplinary care team, early assessment, timely and frequent mobilization, and constant encouragement. A post-intervention interview was also conducted to explore the barriers and facilitators for mobilization during hospitalization. The result shows a significant improvement in balance performance.

Discrepancies between Perceived and Physiological Fall Risks and Repeated Falls among Community-Dwelling Medicare Beneficiaries Aged 65 Years and Older.

OBJECTIVES: This study examined the associations of discrepancies between perceived and physiological fall risks with repeated falls. METHODS: We analyzed the 2016 Medicare Current Beneficiary Survey of 2,487 Medicare beneficiaries aged ≥ 65 years with ≥ 1 fall. The outcome variable was repeated falls (≥ 2 falls), the key independent variable was a categorical variable of discrepancies between perceived (fear of falling) and physiological fall risks (physiological limitations), assessed using multivariate logistic regression. RESULTS: Among Medicare beneficiaries with ≥ 1 fall, 25.1% had low fear of falling but high physiological fall risk (Low Fear-High Physiological), 9.4% had high fear of falling but low physiological fall risk (High Fear-Low Physiological), 23.5% had low fear of falling and low physiological fall risks (Low Fear-Low Physiological), and 42.0% had high fear of falling and high physiological fall risks (High Fear-High Physiological). Having High Fear-High Physiological was associated with repeated falls (OR = 2.14; p < .001) compared to Low Fear-Low Physiological. Having Low Fear-High Physiological and High Fear-LowPhysiological were not associated with repeated falls. CONCLUSIONS: Given that High Fear-High Physiological was associated with repeated falls and that many at-risk Medicare beneficiaries had High Fear-High Physiological, prevention efforts may consider targeting those most at-risk including Medicare beneficiaries with High Fear-High Physiological. CLINICAL IMPLICATIONS: Assessing both perceived and physiological fall risks is clinically relevant, given it may inform targeted interventions for different at-risk Medicare beneficiaries among clinicians and other stakeholders.

A Multidimensional Approach for Nurse Practitioners to Screen Fall Risk and Fear of Falling in Community-Dwelling Older Adults.

Nurse practitioners are essential in the care of the older adult population. Older adults are at high risk for falls; therefore, nursing assessment should include psychological and physiological measures. Fear of falling is a primary psychological contributor to fall risk. The Falls Efficacy Scale International short; Centers for Disease Control and Prevention Stopping Elderly Accidents, Deaths, and Injuries fall risk scale; and Balance Tracking System (BTrackS) balance test are reliable, efficient tools for assessment. Data obtained from these multifactoral tools may inform mobility interventions and education for the patient, further meeting a national safety goal of reducing falls in the older adult population.

Older Adults' Experiences With the Visual Physio-Feedback Technology and Peer-Led Combined Group and Home-Based Exercises.

This study aimed to explore older adults' experience with an in-home Physio-feEdback and Exercise pRogram and explore whether the Physio-feEdback and Exercise pRogram intervention influenced their physical activity adherence. A qualitative study approach was employed, and data were collected using exercise logs, observations, focus groups, and open-ended questions after the program completion. Nineteen participants who engaged in an 8-week Physio-feEdback and Exercise pRogram intervention participated in this study. Thematic analysis was used. Three major concepts of the self-determination theory, including competence, relatedness, and autonomy, were used as guidelines for coding. Results reveal three themes, including: (a) competence-alignment of body and mind and increased awareness about fall risk, (b) relatedness-relationship with peer coach and having fun with friends, and (c) autonomy-integration of exercise into daily activities for staying physically and socially active. Individuals' need for competence and autonomy can be supported by giving physio-feedback, cognitive reframing, and peer-led exercise, which can enhance physical activity and prevent falls.

Determinants of Nephrology Provider Engagement in Comprehensive Pre-Dialysis Discussions with Older Adults: Scale Development and Psychometric Evaluation.

Comprehensive pre-dialysis discussions between providers and older adults over age 75 years are needed but often lacking. The aim of this study was to develop an instrument to assess behavioral determinants of nephrology provider use of comprehensive pre-dialysis discussions with older adults. Study design consisted of cross-sectional development of the instrument and preliminary psychometric evaluation. Items were based on an integrated literature review, expert clinician input, and the Theory of Planned Behavior. Nephrologists, nurse practitioners, and physician assistants completed the instrument (n = 71). Baseline demographic data, exploratory factor analysis, and Cronbach's alpha were analyzed. Initial factor analysis using principal components analysis and subsequent orthogonal rotation revealed loading on a four-factor model. Cronbach's alphas for the instrument/items were 0.89/0.83 to 0.94. Variance explained by the four factors was 58%.

Maladaptive Fall Risk Appraisal and Falling in Community-Dwelling Adults Aged 60 and Older: Implications for Screening.

OBJECTIVES: We aimed to examine the characteristics of maladaptive fall risk appraisal (FRA), discrepancies between physical and perceived-fall risk, and their associations with falls. METHODS: Fall risk appraisal was determined using the full-tandem stand test as an objective measure and the Fall Efficacy Scale-International as a subjective measure, and 433 adults aged ≥60 years from Thailand were classified into four groups: irrational (low physical/high perceived risk), incongruent (high physical/low perceived risk), congruent (high physical/high perceived risk) and rational (low physical/low perceived risk) FRAs. RESULTS: Only 20.8% of adults aged ≥60 years had rational FRA. The rest of the participants had either irrational (57.3%) or incongruent (2.3%), or congruent (19.6%) FRAs. Approximately 74% of those with congruent FRA reported experiencing a fall last year, followed by incongruent (60%), irrational (41.1%), and rational FRAs (27.8%, p < .001). After covariates adjustment, participants with congruent FRA were 3.06 times more likely of falling than those with rational FRA (p = .011). CONCLUSIONS: Maladaptive FRA is highly prevalent among adults aged ≥60. Identifying maladaptive FRA is essential for ensuring that adults aged ≥60 receiving early treatment associated with falls. CLINICAL IMPLICATIONS: Preventing a transition from rational to irrational, incongruent, and congruent fall risk appraisals is vital to prevent falls and mitigate this problematic health condition.

Assessing Fall Risk Appraisal Through Combined Physiological and Perceived Fall Risk Measures Using Innovative Technology.

The current study aimed to categorize fall risk appraisal and quantify discrepancies between perceived fall risk measured subjectively using the short Fall Efficacy Scale-International and physiological fall risk measured objectively using the portable BTrackS™ Assess Balance System. One hundred two community-dwelling older adults were evaluated in this cross-sectional study. Approximately 40% of participants had maladaptive fall risk appraisals, which were either irrational (high perceived risk despite low physiological fall risk) or incongruent (low perceived risk but high physiological fall risk). The remaining 60% of participants had adaptive fall risk appraisals, which were either rational (low perceived risk aligned with low physiological fall risk) or congruent (high perceived risk aligned with high physiological fall risk). Among participants with rational, congruent, irrational, and incongruent appraisals, 21.7%, 66.7%, 28%, and 18.8%, respectively, reported having a history of falls (p < 0.01). Using technology to identify discrepancies in perceived and physiological fall risks can potentially increase the success of fall risk screening and guide fall interventions to target perceived or physiological components of balance. [Journal of Gerontological Nursing, 46(4), 41-47.].

Fear of Falling Assessment and Interventions in Community-Dwelling Older Adults: A Mixed Methods Case-Series.

OBJECTIVES: (1) assess fear of falling (FOF) in community-dwelling older adults using subjective and objective measures and, (2) explore older adults' perceptions of FOF assessments and interventions. METHODS: A mixed methods case-series was utilized. It consisted of quantitative data collection by objective measures including the BTrackSTM Balance Test (BBT) and a dynamometer to assess physiological fall risk, and in-depth interviews from four older adults in Orlando, Florida. A single Fear of Falling Scale and Falls Efficacy Scale-International (FES-I) were used to assess FOF. To combine quantitative and qualitative data, a case-specific analysis was used and followed by a cross-case analysis to gain a more comprehensive understanding of FOF. RESULTS: We found an incongruent fear of falling with physiological fall risk. Four themes emerged: (1) Fluctuating definitions of "fear" contribute to difficulty in assessments and interventions, (2) Fundamental assessments for fear of falling are missing, (3) Feedback from an objective measure is valuable, and (4) Family experiences with fear of falling drive personal interventions. CONCLUSIONS: The integrated viewpoints from quantitative and qualitative data suggest a need for FOF assessment based on older adults' perceptive and physiological measures. CLINICAL IMPLICATIONS: Healthcare providers should assess FOF using subjective and objective measures.

Shifting Maladaptive Fall Risk Appraisal in Older Adults through an in-Home Physio-fEedback and Exercise pRogram (PEER): A Pilot Study.

OBJECTIVES: 1) examine the preliminary effectiveness of the Physio-feEdback and Exercise pRogram (PEER) for shifting maladaptive to adaptive fall risk appraisal and reducing fall risk, 2) determine the participants' feedback and acceptability of the program. METHODS: Forty-one older adults were assigned to either PEER intervention or attention control group. The 8-week PEER intervention consists of a visual physio-feedback, cognitive reframing, and combined group and home-based exercise led by a trained peer coach. The attention control group read fall prevention brochures and continued their normal activities. BTrackS Balance Test (BBT), short version of Fall Efficacy Scale International (short FES-I) and CDC fall risk checklist were measured from pre- to post-intervention. The feedback and acceptability were conducted at the program conclusion. RESULTS: About 11% of participants in the PEER group had positive shifting but none in the attention control group. Up to 32% of the participants in attention control had negative shifting compared to 5.3% in the PEER group. PEER group reported significant decreases in fall risk and high acceptability of the program. CONCLUSIONS: PEER intervention facilitates a shift from maladaptive to adaptive fall risk appraisal and reduces fall risk. CLINICAL IMPLICATIONS: Preventive interventions promoting alignment between perceive and physiological fall risk may contribute to reducing falls and increasing exercise adherence.

Unveiling Fall Triggers in Older Adults: A Machine Learning Graphical Model Analysis.

While existing research has identified diverse fall risk factors in adults aged 60 and older across various areas, comprehensively examining the interrelationships between all factors can enhance our knowledge of complex mechanisms and ultimately prevent falls. This study employs a novel approach-a mixed undirected graphical model (MUGM)-to unravel the interplay between sociodemographics, mental well-being, body composition, self-assessed and performance-based fall risk assessments, and physical activity patterns. Using a parameterized joint probability density, MUGMs specify the higher-order dependence structure and reveals the underlying graphical structure of heterogeneous variables. The MUGM consisting of mixed types of variables (continuous and categorical) has versatile applications that provide innovative and practical insights, as it is equipped to transcend the limitations of traditional correlation analysis and uncover sophisticated interactions within a high-dimensional data set. Our study included 120 elders from central Florida whose 37 fall risk factors were analyzed using an MUGM. Among the identified features, 34 exhibited pairwise relationships, while COVID-19-related factors and housing composition remained conditionally independent from all others. The results from our study serve as a foundational exploration, and future research investigating the longitudinal aspects of these features plays a pivotal role in enhancing our knowledge of the dynamics contributing to fall prevention in this population.

Subjective Functional Difficulties Were Associated With Subjective Cognitive Decline Among U.S. Older Adults: Mentally Unhealthy Days Mediation and Income Level Moderation Effects.

Introduction: Subjective cognitive decline (SCD) is a self-perceived decline in cognition that may progress to mild cognitive impairment or Alzheimer's disease. SCD may be associated with difficulties in daily functioning and psychological distress. Previous research has shown the association between functional difficulties and SCD via mentally unhealthy days (MUDs). However, whether income levels influence the mediation effect of MUDs is less understood. Objectives: This study examined the association between subjective functional difficulties and the odds of SCD through MUDs, and whether the mediation effect was moderated by income levels. Methods: Cross-sectional data were obtained from the 2019 Behavioral Risk Factor Surveillance System (N = 13,160 older adults aged 65+; 7,370 women). SCD was assessed by more frequent or worse memory loss and confusion in the past 12 months. Subjective functional difficulties represented difficulties with daily activities. MUDs denoted the days that a person felt mentally unwell within the past 30 days. We used path analysis with 5,000 bootstrapped confidence intervals and logistic regression to classify the risks of SCD based on subjective functional difficulties and MUDs. Results: Subjective functional difficulties were positively associated with SCD through mediation by MUDs (b = 0.119, 95% CI 0.102, 0.137). After accounting for covariates, we found that greater subjective functional difficulties were associated with 2.50 times the odds of SCD (AOR = 2.50; 95% CI: 2.14, 2.91); MUDs were related to 1.06 times the odds of SCD reporting (AOR = 1.06; 95% CI: 1.05, 1.07). Income levels moderated the indirect effect of MUDs in the subjective functional difficulties-SCD relationship, with an income of <$15,000 showing the most prominent effect. Those earning ≥$50,000 self-reported a lower SCD than those earning <$15,000. Conclusions: Our study extends previous findings by demonstrating that greater subjective functional difficulties are associated with higher odds of SCD through more frequent MUDs, with higher income levels being associated with more SCD reporting.

Recreating Fall Risk Appraisal matrix using R to support fall prevention programs.

Objective: This study aimed to optimize Fall Risk Appraisal (FRA) graphing for use in intervention programs tailored toward reducing the fall risk of older adults by using computing graphic functions in the R language. Materials and Methods: We utilized RStudio, a free development environment for the R language, as well as the functions within the "ggplot2" and "grid" packages, to develop a code that would recreate the FRA matrix for use in data visualization and analysis, as well as feedback for older adults. Results: The developed code successfully recreates the FRA matrix in R and allows researchers and clinicians to graph participant data onto the matrix itself. Discussion: The use of an R code allows for a streamlined approach to manipulating the FRA matrix for use in data visualization and feedback for older adults, which improves upon the traditional paper-pencil method that has been previously used. Conclusions: The code presented in this study recreates the FRA matrix instrument in the R language and gives researchers the ability to instantaneously add, remove, or change different aspects of the instrument to improve its readability for researchers and older adults.

Phase Angle and Impedance Ratio as Indicators of Physical Function and Fear of Falling in Older Adult Women: Cross-Sectional Analysis.

Background: Older adults experience a significant decline in muscle integrity and function with aging. Early detection of decreased muscle quality can pave the way for interventions to mitigate the progression of age-related physical declines. Phase angle (PhA) and impedance ratio (IR) are measures of muscle integrity, which can be assessed quickly via bioelectrical impedance analysis (BIA) and may be indicative of physical function. Objective: This study aimed to characterize the relationships among handgrip strength (HGS), sit-to-stand (STS), BTrackS balance scores, fear of falling (evaluated using the Short Falls Efficacy Scale-International [Short FES-I]), and IR among community-dwelling older adult women classified as having a low or high PhA. Methods: A cross-sectional analysis was conducted with 85 older women (mean age 75.0, SD 7.2 years; mean weight 71.0, SD 15.0 kg; mean height 162.6, SD 6.1 cm). To examine the influence of PhA on performance measures, participants were divided into 2 PhA groups: high (>4.1°; n=56) and low (≤4.1°; n=29). Data were nonnormative; hence, the Mann-Whitney U test was used to evaluate between-group differences, and Kendall τ coefficients were used to determine the partial correlations. Results: The low PhA group had a significantly higher IR (mean 0.85, SD 0.03) than the high PhA group (mean 0.81, SD 0.03; r=.92; P<.001). The high PhA group had superior HGS (mean 21.4, SD 6.2 kg; P=.007; r=0.36), BTrackS balance scores (mean 26.6, SD 9.5 cm; P=.03; r=0.30), and STS scores (mean 16.0, SD 5.5; P<.001; r=0.49) than the low PhA group (mean HGS 17.6, SD 4.7 kg; mean BTrackS balance score 37.1, SD 21.1 cm; mean STS score 10.7, SD 6.2). Both PhA and IR were significantly correlated with HGS and BTrackS balance, STS, and Short FES-I scores (P<.05). However, on adjusting for the whole sample's age, only PhA was strongly correlated with HGS (τb=0.75; P=.003) and STS scores (τb=0.76; P=.002). Short FES-I scores were moderately correlated with IR (τb=0.46; P=.07) after controlling for age. No significant between-group differences were observed for height, weight, or BMI. Conclusions: PhA and IR are associated with physical function and the fear of falling in older women. However, only PhA was significantly associated with physical function (HGS and STS) independent of age. Conversely, only IR was significantly associated with the fear of falling. Diminished physical function and increased IR appear to be characteristics of older women with a PhA of ≤4.1°. These findings suggest that PhA and IR measured through BIA together may serve as a valuable tool for early identification of older women at the risk of functional decline and a heightened fear of falling.